Simplex Trading
IRON icon

Simplex Trading’s Disc Medicine IRON Stock Holding History

Simplex Trading’s Portfolio IRON Stock Details IRON Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$12.8K Sell
200
-1,200
-86% -$83.3K ﹤0.01% 7136
2025
Q4 		$111K Sell
1,400
-400
-22% -$33.8K ﹤0.01% 4891
2025
Q3 		$118K Buy
1,800
+1,300
+260% +$77.3K ﹤0.01% 5545
2025
Q2 		$26K Buy
+500
New +$23.5K ﹤0.01% 6533
2025
Q1 		– Sell
-200
Closed -$12K – 9033
2024
Q4 		$12K Hold
200
– – ﹤0.01% 7068
2024
Q3 		$9K Sell
200
-4,100
-95% -$192K ﹤0.01% 7252
2024
Q2 		$193K Sell
4,300
-40,100
-90% -$1.36M ﹤0.01% 4688
2024
Q1 		$2.76M Buy
44,400
+43,900
+8,780% +$2.85M ﹤0.01% 2099
2023
Q4 		$28K Sell
500
-300
-38% -$15.4K ﹤0.01% 6625
2023
Q3 		$37K Sell
800
-400
-33% -$20K ﹤0.01% 6072
2023
Q2 		$53K Buy
+1,200
New +$42.6K ﹤0.01% 5796
2022
Q4 		– Sell
-1,217
Closed -$59K – 9751
2022
Q3 		$59K Buy
1,217
+860
+241% +$40.6K ﹤0.01% 6212
2022
Q2 		$18K Buy
+357
New +$15.8K ﹤0.01% 7718
2022
Q1 		– Sell
-163
Closed -$14K – 10875
2021
Q4 		$14K Sell
163
-220
-57% -$21.6K ﹤0.01% 8742
2021
Q3 		$72K Hold
383
– – ﹤0.01% 7052
2021
Q2 		$74K Buy
+383
New +$126K ﹤0.01% 7150
2021
Q1 		– Hold
0
– – – 7793

Other funds holding IRON

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
RCM
RA Capital Management Boston, Massachusetts $9.44B AUM 157.3% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $790M AUM 223.66% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
FLSM
Frazier Life Sciences Management Palo Alto, California $3.89B AUM 201.1% 1-Year Est. Return
TCM
TCG Crossover Management Palo Alto, California $3.5B AUM 1,165.83% 1-Year Est. Return

Simplex Trading's IRON Position: Q4 2025 in Review

Simplex Trading sold out of Disc Medicine (IRON) in Q4 2025, closing a stake of 800 shares — an estimated $67.6K sold.

Simplex Trading first reported a position in IRON in Q1 2021 and held it in 12 quarters. The position peaked at $680K in Q1 2021. 196 funds tracked by Wall St. Rank hold IRON as of Q4 2025.

  • Simplex Trading reported no remaining Disc Medicine position as of Q4 2025 after selling out during the quarter.
  • Simplex Trading sold 800 Disc Medicine shares in Q4 2025, an estimated $67.6K.
  • Simplex Trading first reported a position in Disc Medicine in Q1 2021 and held it in 12 quarters.
  • Simplex Trading's Disc Medicine position peaked at $680K in Q1 2021.
  • 196 funds tracked by Wall St. Rank held Disc Medicine as of Q4 2025.

Based on Simplex Trading's 13F filing for Q4 2025, filed 11 Feb 2026.